The anti-slip backing keeps the door mat firmly in place and reduces the risk of slipping. http://www.ikea.com/gb/en/images/products/borris-door-mat-blue__0106308_PE254355_S4.JPGBORRIS Door mat, dark bluehttp://www.ikea.com/gb/en/catalog/products/80186688/801.866.88IKEA£0.60